FVXX21 KWBC 261900 VOLCANIC ASH ADVISORY ISSUED 1900 UTC 26 JUL 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-874 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE...INFRARED...AND MULTISPECTRAL IMAGERY. THE GEOPHYSICAL INSTITUTE IN QUITO. . ERUPTION DETAILS: OCCASIONAL EMISSIONS OF ASH AND STEAM. . DETAILS OF ASH: GOES-8 IMAGERY THROUGH 1845 UTC DOES NOT INDICATE THE PRESENCE OF ANY ASH. AN EARLIER SIGMET FROM GUAYAQUIL INDICATED ASH OVER THE VOLCANO AT SUMMIT LEVEL. TUNGURAHUA REMAINS IN A VERY ACTIVE STATE AND COULD PRODUCE ASH AT ANYTIME. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST ANY ASH AT OR NEAR SUMMIT LEVEL TO MOVE WEST AT 10 TO 15 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 27/0100 UTC. . REAL TIME SATELLITE IMAGERY ALONG WITH THIS AND OTHER VOLCANIC ASH ADVISORIES OFTEN ACCOMPANIED BY A MAP DEPICTING ASH LOCATION ARE AVAILABLE AT INTERNET URL ADDRESS http://www.ssd.noaa.gov/VAAC/washington.html (all lower case except /VAAC/) . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . HUGHES . NNNN